bump because this informative!!!

 

very helpful gonna try this

 

Just to make sure before I fry something. I don't have an e-10 32 pin so I'm guessing I'm going to have to tap into it. question . You say hook up pin 32 twice.....once in the top pin and again at the right middle pin....will this cause any problems hooking up the same line to two different pins??

 

you can hook it up to pin 31 e10 (efi main relay). You should be fine with hooking it up to the same pins

 

Those two pin just need to be a positive 12volt ignition power. You can pull it using other equivalent pin. I was just using the e10-32 as one of the pins that could be used.

 

I still can't figure it out. Had dr.tweak make the harness originally for aristo ecu. I never ran it and put in a supra jdm 6 speed ecu. Tweak has a relay wired into the harness for the ac. The compressor will not kick on. Tweak told me to remove the relay by cutting the two wires coming from the ecu and cap them off and the other two going to the engine connect together. I did hat and still nothing. Light comes on green when I push the ac bottom on climate but compressor will not come on.

 

I also have a tweak harness with the relay. (94 sc300 with jzz30 ecu) Somehow my ecu needs a ground signal to kick on the clutch. After i removed the 12v relay, A/C worked.

 

anyone have the pic from post 29??

 

I wish someone did!

 

SG - here you go . Check the link , I have explained it well on that thread.

https://www.clublexus.com/forums/per...de-easy-7.html

 

the JDM supra ecu uses the same a/c signal as the sc300, so if you need a relay the you are likely using an aristo ecu.
If you want to do it with no relays you can also just swap the aristo ecu for a jdm supra auto ecu.

SC/supra a/c signals are the same (lets say type 1).
GS/aristo a/c signals are also the same (lets say type 2)...

but GS/aristo is the opposite of the SC/supra, hence the need for the relay in the SC when using an aristo ecu.

 

Mannnnnnn,
I'm semi committed.
I got an Aristo refreshed at Tanin and a spare. I'll go resistor shopping.

Thanks!

 

Thanks Gerrb!

 

there is also a link on the tt ecu page to one of the other posts with the a/c fix, forget which one exactly.

 

old thread again, I know. Sorry. subscribed so I can come back to it after I do the TT ECU mod.